ABSTRACT
The contact-induced rotations of bridge decks may produce significant residual displacements and damage the piers and the bents. The frictional contact force, which is neglected in relevant specifications, was verified as the dominant reason. This study aims to explore the seismic displacement demands for seat-type skew bridges involving frictional deck-abutment pounding. Firstly, the study utilizes the nonsmooth dynamic analysis framework to clarify the criteria of the bridge rotation because of pounding. And then, the study adopts fragility analysis to evaluate the influence of frictional contact forces upon the deck unseating probability. Finally, the study proposes seismic displacement demands for skew or straight bridges taking into account frictional deck-abutment pounding based on ALARP principle.
